Outer Space & Universe
Outer Space & Universe
Space, also known as outer space, is the near-vacuum between celestial bodies. It is where everything (all of the planets, stars, galaxies and other objects) is found.
On Earth, space begins at the Kármán line (100 km above sea level). This is where Earth's atmosphere is said to stop and outer space begins. This is not a firm boundary but is a convention used by scientists and diplomats.
Items in space are free to move back and forth; up and down; and left and right. These three dimensions are what make 3D space. Items also move forward through time, which is sometimes called the fourth dimension.
The majority of space contains very little matter and so most of it is a vacuum. Scientists do not know how big space is but we do know that space is extremely big, and is always expanding.
According to the big bang theory, all matter and energy in the Universe was compressed into a very small space. Then it exploded and started expanding. Space is still growing in size today; this means the distance from one galaxy to distant galaxies is getting longer.
Gravity is the force that keeps the Moon in orbit around the Earth and the planets in orbit around the Sun. Gravity can stretch and bend space similar to how a heavy ball placed on a stretched sheet of rubber will cause the rubber to stretch. The scientist who discovered that space can bend is named Albert Einstein. How gravity bends space is part of his theory of general relativity.
Astronauts, Cosmonauts, Taikonauts and Spationauts
An astronaut is any person who is trained by NASA to travel and perform tasks in space. Although the space traveler may not necessarily be a United States citizen, each astronaut does go through a rigorous training regiment by the National Aeronautics and Space Administration. Other space travelers go by other names then astronaut depending on their country of origin.
In the United States, astronaut is derived from the Greek words ástron (star) and nautis (sailor). While, in Russia, a space traveler goes by the name космонавт (English: cosmonaut), which is derived from the Greek words kosmos (universe) and nautis (sailor). Westerners call a space traveler from China a taikonaut, based on the 1998 writings of Chiew Lee Yik and Chen Lan where the term tàikōng (great emptiness), Chinese for “space”. In China, the term yuháng yuán (universe navigator) is used for space traveler.
Only the United States of America (United States), Russia (earlier, the Union of Soviet Socialist Republics), and the People’s Republic of China (China) have sent manned spacecraft into space. Other countries have assisted these countries by sending their own space travelers on space missions. For instance, a French space traveler is called a spationaut (from the French word spationaute), which is derived from the Latin spatium (space) and Greek nautis (sailor). (plural in Greek nautes = sailors)
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05:45
Red Alert! Major Category 4 Hurricane Hilary 48 hours away from Southern California landfall.
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05:14
Super RED ALERT! Catastrophic Flooding 4 Southern California? August 29th Hurricane & Canada on Fire
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01:08
India's Chandrayaan-3 moon lander captures amazing close-ups of lunar surface
Added 75 Views / 0 LikesThe Chandrayaan-3's Lander Position Detection Camera (LPDC) captured several images of the lunar surface on August 15th and 17th, 2023. Full Story: https://www.space.com/india-chandrayaan-3-moon-photos-august-2023Credit: ISROMusic: Landscapes in a Daydrea
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01:08
Hurricane Hilary turns into a category 4 storm in amazing satellite time-lapse
Added 75 Views / 0 LikesNOAA's GOES-East and GOES-West satelltes captured imagery of Hurricane Hilary from Aug. 16-18, 2023. Credit: Space.com | footage courtesy: CIRA/NOAA | edited by Steve Spaleta (https://twitter.com/stevespaleta)
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01:37
Neptune's clouds are vanishing, Hubble Space Telescope reveals
Added 62 Views / 0 LikesHubble Space Telescope imagery of Neptune has revealed that the planet's clouds are disappearing and the Sun may be to blame: https://www.space.com/neptune-clouds-vanish-solar-activity-responsibleCredit: NASA Goddard Space Flight Center
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02:47
Space to Ground: Tracking a Trend: Aug.18, 2023
Added 58 Views / 0 LikesNASA's Space to Ground is your weekly update on what's happening aboard the International Space Station. Got a question or comment? Use #AskNASA to talk to us.Learn more about the important research being operated on Station:https://www.nasa.gov/iss-scien
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08:34
RED ALERT! California Nevada Oregon & Idaho in tropical cyclone probability cone of Hurricane Hilary
Added 77 Views / 0 LikesWild weather ahead!God bless everyone,
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05:27
Hurricane Hilary Strengthens! August 29th Hurricane! Bitcoin crashes as SpaceX unloads $373 Million!
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01:39
New type of star has been discovered!'Likely to become a magnetar'
Added 62 Views / 0 LikesA "massive magnetic helium" star has been discovered by astronomers using multiple telescopes. It is "likely to become a magnetar," according to the European Southern Observatory.Credit: ESO
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08:06
Big Hurricane Hilary impacts headed to California, Arizona & Nevada! & WTF Tik Tok Time Travelers ?
Added 67 Views / 0 LikesIt's going to be a wild 2nd half of August!God bless everyone,Thttps://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewison$THORnews on CashApphttps://www.patreon.com/thornews
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07:50
Are we really made of 'star stuff'? Learn about your body's elements
Added 56 Views / 0 LikesAstrophysicist Suzanna Randall explains where the elements in our body come from in this episode of "Starlight" from the European Southern Observatory. Credit:ESODirected by: Martin Wallner, Luis Calçada, Martin KornmesserHosted by: Suzanna Randall Writte
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08:56
Why I believe Hurricane Hilary is Dangerous for California & am worried about August 29th for Gulf.
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12:02
SpaceX launches 22 Starlink satellites from Cape Canaveral Space Force Station
Added 64 Views / 0 LikesA SpaceX Falcon 9 rocket launched 22 Starlink satellites from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida in August 16 at 11:36 p.m. ET. Full Story: https://www.space.com/spacex-starlink-launch-group-6-10The first sta
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Starlink Mission Control Audio
Added 59 Views / 0 LikesThis is the vehicle trajectory and mission control audio without any additional commentary. There may be very long periods of silence. For our full hosted webcast, visit https://www.spacex.com/launches/
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07:00
RED ALERT! Hurricane Hilary will be a BIG THREAT to San Diego & Los Angeles California!
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07:59
RED ALERT! Hurricane* Hilary to Hit Southern California on Monday?!?
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00:41
See how long a solar storm took to reach 8 spacecrafts and a Mars rover
Added 62 Views / 0 LikesESA’s Venus Express, Mars Express, and Rosetta spacecraft along with NASA’s Stereo-A, Mars Odyssey, Maven and Curiosity rover detected a coronal mass ejection in 2014. "Hints of the CME were also seen at NASA’s New Horizons and Voyager-2," according to ES